Alarm-circuit system



' shown in United Patented Nov. 5, 1929 l' ALARM-CIRCUIT SYSTEM 'Application led January 25,- 1928, Serial No. 249,355,-andwin Germany July-3, 1925.

Gur invention relates toan alarm .circuit system, in whicht-he alarmcalls of alarming stationsl received in 'alarm receiving stations are sent on to other `alarm,receiving stations. In alarm-installations in which the alarm calls-received are to be 'collected in a central station and sent on from the latter' to fur-ther alarm receivingstati'ons (district stations), desirable that the said district-stations which" yarel allottedhto the singlegroups of alarm giving ,stations,- should be notiied as early asjpossible of any incoming alarm with-- in' their district. Theobject or' the present invention isgto' accomplish such result in a simple andV reliable manner, this' being achievedby providing arrangements in the central station for giving a preliminary alarm in districtlstations, before the alarm calls are transmitted. 1 Y .i rriAf construction. .according to the present invention-is illustrated by, way of example in the accompanying drawing. i In the drawing is shown an alarm giving station AGS 431 with the telephone .instrument N, al `distributing Astation "VS 1, the t alarm receiving station-HB7` with the switch devices required'for; explaining theinvention, and two further alarm receiving stations FWl' and FW2: -The selector lVlf shown in the drawing with the switch arms w11., w12, lw13 and w14 is afrotary selector of' the well known type States Patent No..1,126,727. The selector 1R72 with the two switch arms lw21 and lw22, shown, is a lifting-rotary Yselector of the `Well known construction. Its corresponding advance magnets are the lifting magnet H and the rotary magnet D2. The rotary magnetDlis the advance magnet for the` selector W1. a

vr'flletfitvbe assumed that an' alarm is to be given romf'thealarm giving stationAGSt 431- to the alarm receiving Vstation HBW. Fromthe latter the alarm is then sent on to the :further alarm; freceiving 'stations vFVVl and FW 2A in a'manner which is immaterial .to

theg ;presentlinvention. lThe alarm' may be sent; from; the i central alarm receiving station tothe `district receivingy station lllVVl or FVVZf-in the manner describedl in our British -r-Pat-ent Numbe'rp 270,755. rllhe asig- 'GitsBnR'rUs c onivnnis. sNYnEns, CORNELIUS Venannirn, Jn., aan 'VAN 'De' KAMP; Ann

nantns vJanv/"ARD ADRrANUs MAITLAND, or erfrsrnnnara, `Narrrrrrananns Y nals. mayl also'fbe transmitted manually,` as l' for example by-means of a key ST 11 yin the central stationand a bell ST 12 located in the district receivingstation Fl/Vl as shown in the drawing` ln the alarm giving stat-ion yAGrS 431 are 4provid'edfdevices as described inV our British-Patent No. 269,941 and not shown in the drawing,by means'of which is obtained ythe characterizations of the alarm giving station-at the alarm receivingstation HBW. ,f i t 'lhefalarm giving station AGS 431 is connected by means of a connection line to the distributing station VS 1 in which by means oi' call seekers, asshownin theabovemen.

tioned British Patent No. 269,941, the conv nection to `the alarm vreceiving station is eff fected in a well known manner... VThe relay A arranged at Athe. distributing stationy V55' 1, is used as a current impulserelay for the currentv impulses sent [from the alarm giving station AGS 431. The relay *.Bis intended for switching processes which arenot shown in the drawing and are immaterial to the 1invention. These processesarelexplainedin detail in our British Patent No.269,9 41. W ith the aid of its contact 1a, the current impulse relay A eiiects the sending on-of the current impulses received, tov the alarmV receiving station HBVJ.; v, Y

The characterization ofthe alarm giving station AGS 431 in the alarm receivingstation 'HBW when an alarm, for instancea fire*` alarm, is sent 1rom the latter station, is obtained owing tothe fact that at the said alarm giving. stationisdialed a given number,

in our example, the No; 431'; for instance by means of a number disc (not shown in the drawing), and this number is `indicated to the attendant in the alarm receiving station by the lighting of lamps. The call seeker AS in the connection line a Z1 is set then to the-said alarm givingv station. Owing tothis setting, through the @conductor ofthe call seeker is closed the following test cir- .ze

cuit :-earth, c arm-of the call seeker, c conductor, windings l and II ofthe test relay P, restcontact 3f, battery, earth.V On the relay P becoming operative, the winding 1I of the relay will be short eircuited by the Contact ice ' 2p for this purpose. If during the period same being connected in parallel to the lowohmic winding I of the test relay P. The relay of the second call-seeker does not get sufficient current to' become operative and' therefore does not stop the call seeker at such moment, preventing inthis manner the connection of the second connection line through to the line of the first alarming s-tation. y Owing to the operation of the relay P,`the contact 5p will be opened, andthe release magnet of the selector W2 switched off. Owingtothe closing of thecontact 12p, a circuit Will be closed forthe call lamp L II :'-earth, working Vcontact 12p, lamp L II, battery, earth.` Owing to the lighting of the call lamp L ILthe attention of the attendant in the alarm receiving station HBW will be -drawn to the'calling alarm call. Owing to the closing of the contact 4p, an excitation circuit'will be closed for the current impulse receivingrelay J of the' alarm receiving station' HBW earth, rest contact la, choking coils Dr, a and b armof the call seeker AS, a

v and b conductors'. of the connection line, choking' coils'Dr,"relay J, working contact 4p, battery,earth;' The alarm receiving station HBV is Vnow prepared toV receiveA the first series of current impulses.

The alarm sender at the alarm giving station AGSt 431 dials now, for instance by means of his number disc, the digit 4. The relay A at the distributing station' VS1? l follows the current -impulse thus produced,

and by means of the contact la, these current impulses are transmitted along the path described above, to the relay J of the alarm Vreceiving station HBW. As soon as the relay` J becomes operative an excitation circuit Willbe closed for the relay K1 whichis built as ak retardation relay and therefore remains excitedduring the whole series `of current impulses earth` relay K1, working contact 2li, battery, earth.l Owing to the operation of the relay K1, the contact 20t'1 will be opened, and the relays V1, V2 and V3 prevented from lbecoming operative'.

v'lhrough the contact 7i, the four current impulses of the first current impulse'series will be transmitted to the rotary magnet D1 of the selector Wlz-earth, rotary magnet Dl, rest contactv 8/01, current impulse contact 7i, battery, earth.

The selector will be thereby turned to the extent of four steps. With its switch arm w13, it prepares circuit for the relays V1,

V2 and V3. After the termination of the first current impulse series (four current impulses), the relay K has its current cut off again, as the contact 2li permanently breaks its excitation circuit. Owing to the closing of the rest contact 20161,' therewillben closed therefore an excitation circuit fortliev relay V1:-earth, rest contact 20M, rest contact 15211, relay V1, lrest contact 22f, selector arm ,l

w13 of the selectory W1, battery, earth.;4 By turning over its Contact l15151, the relay Vl createsl for itself a holding circuit independent of K1 z-earth, working contact 151:1, relay V1, rest contact 22flswitchf'arm w13 of the selector W1, battery, earth.` g

At the same timethe'contact `28?:1 isf closed, owing to which an excitation circuit is closed for the relay R of a further alarm receiving station (FWl) connected ink any desired'man: ner' (by means of thefke'y lVT'l) :=-e:arth,"re lay R, signal line SLl, key WTl, restc'ontact 29/03, working contact 28M, battery, earth.

The purpose of the keys VVT-1 and WT2, which are located in the central receivingstai tion HBW, is to enable an opera-tor vin the central receiving station to selectivelydetermine to which district receiving station aprelimi nary alarm signal will be sent." That is,`a 'fire company located at FWl' might already be out fighting a fire and in that event the pre1 liminary alarm signall coming over the circuit which includes key 28111 could be transfered by the operatorto a near district-re'-v ceiving station `F W2. Thus both stations F W1 and FW2 'are necessarily Aconnected to Y the same alarm Contact 28h11 The relay R, by closing its contact 307', produces the switching in of the preliminary alarm'hooter AH; According to the invention,I the attendant at t-he alarm receivinglstation FWl'h'asthen his 'attention drawn by the preliminary alarm hooter AH to the factthat'an alarm is coming in. Y y Simultaneously with the said processes, the contact 8011' is changed over owinfr tothe eX` cit-ation of the relay V1. If the alDa'rm-sender at the alarm giving station AGSt 431 dials the'digit 3 ofhis numbeigthen the current` impulse series produced therebyandvconstt tuted by three current impulses, willbetrans# mitted therefore to the lifting magnet` H of the selector W2 earth, lifting magnet H, rest Contact 9722, working lcontact 8121', current impulse contact 7i, battery, earth). Duri ing this second'transmissionv of currentV im-v pulses, the'relay K1 will be again' excited'in the same manner as already described and in that way will be'opened the contact 201011,4 sothatthe relay V2 will not be able'to beieome operative on the closing of the offnormal contact 18k. The selector -W2 is raised by the Vsecond current impulse series (three current impulses) to its thirddecade.

After the termination of the second current impulse series, current will b eagain cut off from therelay Kwhich will close its .rest contact 20701whereupon1 the relay V2will be eXcitcd:eart-h, rest contact 20u1,'restfcon 'tact-16712, oit-normal contact 18k,"relay-V2, rest contact 22], switch arm '5013,'o the 'selector W1, battery, earth.v During the lifting of the selector W2 vto'the `viven decade, the

off-normal contactllkwas closed'.v Owing to the changing overl ot the Contact 16112, a holding circuit independent ofthe contact 207:1, will be produced for the relay V2.i Y The contactr9v12will be turned over, and the rotary magnet D2 of the selector N2 will/be prepared for the reception ofthe third series of current impulses.

When the alarm sender in the alarm giving station AGSt 431 dials now the third and last digit of his number (the digit 1), this current impulse will be transmitted to the rotary magnet D2 of the selector W2 which is of the well known Strowger vertical and rotary type as shown in United States Patent No. 672,942, along the following path earth, rotary magnet D2, rest contact 10113, working contact 9012, working contact 8211, current impulse contact 72', battery, earth. The *switch arms (in the drawing are shown only the switch arms w21, w22) of the selector 72 are advanced to one step in the given decade (3rd decade), in accordance with the current impulse. During the turning ot the selector the spindle contact 1910 is closed in any desired mechanical manner.

When after the termination of the third series of current impulses, current is cut oit from the relay K1 which had again become operative during the current impulse sending owing to the closing of the contact 21a' an excitation circuit will beV closed for the relay V3 :-earth, rest Contact 20101, rest contact-17013, spindle contact 1910, relay V3, rest contact 227, switch arm w13 of the selector V171, battery, earth.

Owing to the changing or turning over of the contact 17'03, a holding circuit independent of K1, will be closed for the relay V3.

IAs soon as the relay V3 becomes operative, it opens its contact 29413 and thus switches oit the preliminary alarm to the further alarm receiving `stations (FVVl, FW2). At the same time is closed the contactv 13113, and the lamp L HI switched in. Owing to the lighting of the lamp L III, theattendant at the alarm receiving station v. HBVV is notified that the alarm sending by thealarm giving station AGS 431 (number selection) is iinished. Owing to the changing over ot' the contact 10713, the rotary magnet D2 of the selector W2 is cut out, and the relay K2 excited :-earth, relay K2, working contact 10113, working contact 9112, working Contact 8'111, current impulse contact 7i, battery, earth. With its contact 11702, the relay K2 brings about the switching in 01"I the lamp L I:Vearth, working contact abandoned the alarm giving station AGS?? g 431 after giving ythe `alarm (that is, after completing the number selection);` The attendant at the alarm receiving station `HBVVl switches then `his enquiryv apparatus'AbA'into the connection.line-,cfl Z1. yThe arrangement of connections for the enquiry apparatus AA `is.not shown in thedrawingg-.asithef'connections inquestion are immaterial `tol thev present invention. `l vthe alarmA sender still remains at the 4alarm givingstation AGSZ 431, the attendant-ot the alarm receiving'station HBWasks'for fuller particulars about'the' alarm in questionr (for l instance themagnitude and kind of the tire) N is the telephone apparatus oft-the alarm givingstation GS -43'19V WVVh'en the enquiry instrument `is switched into the connectionline a Z), an excitation circuit will be closed for 4therelay L :-earth, plug, lrey, `relay L, battery, earth. The relay L closes its contacts 231,'24Z and 255 and switches inthe lamps H4, Z3,'E1, in the lamp lield, ivhich correspond to the calling alarm giving station'AGSt'431. rllhe selector W2, which,v as stated,y is of the' Strowger type 'shown 'lin United States Pat:

ent-'672,942,1is constructed in such a manner i that its switch arm w21 passes over banks of 'contacts `which are interlinlred or con- I lico nected together inthe direction of'rotation oit the l selector, whilstk the yswitch arm w22 passes overbanlrs otcontacts'which are interlinked inl'theldi'rect'ion ofli'ftingiof the selector. This-'ensures that a lampy field of 3X 10 lamps will be able to indicate without I ambiguity a` range fof. 1000. numbers. Thel arrows'inlthedrawing indicate in the well known'manner the multiple switching of the lamp field. The attendant at the alarm lreceiving station HB1/V sends them in any dei Sired manner, 4for instance bynumberi selection, which is described in our BritlshPatent No.l 270,755, the number received-in our eXample'431-to the next 'alarm receiving station, for instance FWl or 'FVW'. l

Afterthe alarm hasbeen sent onto the next alarm'receivingstation e(FVVl, FW2), the attendant :depresses the lreyfAT. 'In that way the relay l? isenergizedif-earth, relay l?, switchA arm` 'w12' of the Vselector VW1, re- 11 lleaselreyA'T, battery, earth'. The relay F isconnected to the thfcontact of the contact .bankof thev selector W1. c The switchfarms w11, w12, w13 and w114-were set to the fifth contactfof the Contact bank, by theV sending of ythe first current impulseseries consisting ot tour currentimpulses. VThe .relay 'F closes for.itself, by -means ofitsy contact 267i, a

-holdingcircuit.. means of its .contact 2 7f,

itj brings the: 'automatically actingy interrupter UB lagainst the. rotary magnet D1.; ofthe selector W1 through 4the switch arml w11; In that Way-the .selectorW1'1 is turned back to its'positionof rest. By opening the contact 227", theexcitation circuits for the relaysVl, V2 and V3 lare opened, and by the, opening of the contact-3f, the constantA circuit for the test relay P iscut. The rest contact 5p Y closes thereforev anexcitation circuit for the release magnet M 'of the selector W2 -earth,

rest contact 5p,- release magnetM, olf-normal contactfG/t, battery, earth. Therelea'se magnet Mk produces then in .any desired mechanical mannerthe release of the selector'WQ, whereupon the .installation is again inthe position of rest; I Y

Having -now particularly described `andasl certaine'd the nature of ourv said invention and inwhat manner the same is tovbe performed, Wev declare vvthat whatwe claim is l. An alarm circuit system comprising alarm transmittingstations divided into districts, a central. alarm receiving station, dis- -trict'y alarmzreceiving stations, means at each alarm transmitting station for transmitting to the central-station a code of impulses consistingof a plurality of; parts characteristic .ofthe particular alarm transmitting station and district in'which said station is located,

district station assigned to said Valarm transmitting station. f

2. An alarmV circuit system comprising alarm transmitting stations divided in-todistricts, a centralalarm receiving station, district alarm receiving stations, means at each alarm transmitting station for transmitting .to the central station ay code of impulses conv sisting of a plurality of parts characteristic of the particular alarm transmitting station and district inwhich said station is located', a part of said code. impulses 'characterizing Vthe district in Whichpthe alarm transmitting station is located, the otherparts ofsaid code nnpulses following in sequence the said first mentioned part of the code impulses and com.-

;pleting the characterization of the particular alarm transmitting station, means. at the central stationV for transmitting the ,alarms received from the transmitting station to the district stations, means operated by the part of the code impulses characterizing the district vin Vwhich theI particular alarm,V transmittingi station-V is u located.r for sending a Preliminary Signal. im a Selected Idistrict ,Stai tion assigned to., said? alarm. transmitting station and means for discontinuing saidv prey liminaryfalarm on the recei parts ofthe code impulses.

In :testimony kwhereof awe atix` our signa,- tures. n, Y

GislaRTUsk CORNELIS, sNYpERs. CoRNl-:Llus coRnYN, Jr. Y JANynaexAMr,

CHARLES EDWARD ApRLANus'. MpAiTLAND'.

pit. omheen-other 

